ATS 601-904-4308 Allison 6-Speed Conversion Co-Pilot Transmission Controller | 2006-2024 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Features:

• Advanced Co-Pilot transmission controller for Allison 6-speed conversions

• Designed for 2006–2024 GM Duramax 6.6L applications

• Enables full control and optimization of the Allison transmission shift strategy

• Improves drivability, shift quality, and transmission durability

• Supports higher horsepower builds and aggressive tuning

• Includes wiring harness, control module, and installation hardware

The ATS 601-904-4308 Allison 6-Speed Conversion Co-Pilot is the ultimate controller for GM Duramax owners upgrading or modifying their Allison transmissions. Whether you're converting a 5-speed to a 6-speed or enhancing shift logic in a tuned truck, this unit provides superior control over line pressure, torque converter lockup, and gear selection. Built for towing and high-performance use, the Co-Pilot ensures your transmission operates safely and efficiently even under heavy loads or boosted power levels.

Fitment: 2006–2024 GM Silverado / Sierra 2500HD / 3500HD 6.6L Duramax
Warranty: 5-year limited warranty from ATS Diesel
Fitment Notes: Compatible with 6-speed Allison transmissions. Custom tuning recommended for best performance. Not required for stock transmissions. Professional installation and calibration recommended.